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Works on the bridges are expected to begin in 2015 and 99 percent of the replacements will be complete by August 31, 2018. The majority of the Replacement Bridges are single and multi-span bridges that will be replaced in-kind.

The concessionaire will be reimbursed through an availability payment structure over an anticipated term of between 25 and 35 years.

Under the contract, the contractor will be limited in how long it can close each bridge to traffic during the replacement process. Single-span bridges can be closed no more than 60 days and multi-span bridges, 110 days.

They absolutely can't have the bridge closed for longer than that. The fact that they are prefabricating so much of the components, it's going to be a lot like Legos. They are going to be able to get in and get out a whole lot faster than they would on a traditional project. So in terms of impact to the community and detours and so forth, by doing it this way, that program is going to be less.

Pennsylvania is taking advantage of the new P3 tool that Governor Corbett signed into law in 2012 to begin a new initiative to address the state's nearly 4,500 Structurally Deficient (SD) bridges. With the P3 approach, the state can replace hundreds of these bridges more quickly; save money; and minimize the impact on the traveling public.

To download the list of 558 bridges for the P3 contract click on the link below: